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SDTM variables are important concept, need to be understand determines the type of information conveyed by the variables about each distinct observation and how it can be used.

5 types od SDTM variables are there

  1. Identifier Variable—Identifier variables which identify the study, subject(animal/human) involved in the study, the domain and sequence number of record.
  • Topic Variable– Topic variables deal of observation and it may vary according to the type of observation.
  • Timing Variable– this describes the timing of observation like start date and end date
  • Qualifier Variables— these variables describe the results of an observation with text or numeric values.
  • Rule variable— describe the method or algorithm for calculation or logical condition(loop), mainly used for the trial design domain.

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